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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Authority control | 1/3 | https://en.wikipedia.org/wiki/Authority_control | reference | science, encyclopedia | 2026-05-05T07:22:25.700102+00:00 | kb-cron |
In information science, authority control is a process that organizes information, for example in library catalogs, by using a single, distinct spelling of a name (heading) or an identifier (generally persistent and alphanumeric) for each topic or concept. The word authority in authority control derives from the idea that the names of people, places, things, and concepts are authorized, i.e., they are established in one particular form. These one-of-a-kind headings or identifiers are applied consistently throughout catalogs which make use of the respective authority file, and are applied for other methods of organizing data such as linkages and cross references. Each controlled entry is described in an authority record in terms of its scope and usage, and this organization helps the library staff maintain the catalog and make it user-friendly for researchers. Catalogers assign each subject—such as author, topic, series, or corporation—a particular unique identifier or heading term which is then used consistently, uniquely, and unambiguously for all references to that same subject, which removes variations from different spellings, transliterations, pen names, or aliases. The unique header can guide users to all relevant information including related or collocated subjects. Authority records can be combined into a database and called an authority file, and maintaining and updating these files as well as "logical linkages" to other files within them is the work of librarians and other information catalogers. Accordingly, authority control is an example of controlled vocabulary and of bibliographic control. While in theory any piece of information is amenable to authority control such as personal and corporate names, uniform titles, series names, and subjects, library catalogers typically focus on author names and titles of works. Since 1898, one of the most commonly used authority files globally is the subject headings from the Library of Congress. As time passes, information changes, prompting needs for reorganization. According to one view, authority control is not about creating a perfect seamless system but rather it is an ongoing effort to keep up with these changes and try to bring "structure and order" to the task of helping users find information.
== Benefits of authority control == Better researching. Authority control helps researchers understand a specific subject with less wasted effort. A well-designed digital catalog/database enables a researcher to query a few words of an entry to bring up the already established term or phrase, thus improving accuracy and saving time. Makes searching more predictable. It can be used in conjunction with keyword searching using "and" or "not" or "or" or other Boolean operators on a web browser. It increases chances that a given search will return relevant items. Consistency of records. Organization and structure of information. Efficiency for catalogers. The process of authority control is not only of great help to researchers searching for a particular subject to study, but it can help catalogers organize information as well. Catalogers can use authority records when trying to categorize new items, since they can see which records have already been cataloged and can therefore avoid unnecessary work. Maximizes library resources. Authority control helps ensure libraries have an accurate inventory of their materials, so that, for example, duplicate orders are not placed for an already owned resource. Fewer errors. It can help catch errors caused by typos or misspellings which can sometimes accumulate over time, sometimes known as quality drift. These errors can then be corrected by library staff or by automated clean-up software.
== Examples ==
=== Diverse names describe the same subject ===
Sometimes within a catalog, there are diverse names or spellings for only one person or subject. This variation may cause researchers to overlook relevant information. Authority control is used by catalogers to collocate materials that logically belong together but that present themselves differently. Records are used to establish uniform titles that collocate all versions of a given work under one unique heading even when such versions are issued under different titles. With authority control, one unique preferred name represents all variations and will include different variations, spellings and misspellings, uppercase versus lowercase variants, differing dates, and so forth. For example, in Wikipedia, the first wife of Charles III is described by an article Diana, Princess of Wales as well as numerous other descriptors, e.g. Princess Diana, but both Princess Diana and Diana, Princess of Wales describe the same person so they all redirect to the same main article; in general, all authority records choose one title as the preferred one for consistency. In an online library catalog, various entries might look like the following:
Diana. (1) Diana, Princess of Wales. (1) Diana, Princess of Wales, 1961–1997. (13) Diana, Princess of Wales 1961–1997. (1) Diana, Princess of Wales, 1961–1997. (2) DIANA, PRINCESS OF WALES, 1961–1997. (1) These terms describe the same person. Accordingly, authority control reduces these entries to one unique entry or officially authorized heading, sometimes termed an access point: Diana, Princess of Wales, 1961–1997.